New media playback UI.

Source/core/html/HTMLMediaElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 3037 matching lines @@
     stopPeriodicTimers();
     m_loadTimer.stop();
 
     m_pendingActionFlags &= ~flags;
     m_loadState = WaitingForSource;
 
     // We can't cast if we don't have a media player.
     m_remoteRoutesAvailable = false;
     m_playingRemotely = false;
     if (mediaControls())
-        mediaControls()->refreshCastButtonVisibility();
+        mediaControls()->refreshCastButtonVisibilityWithoutUpdate();
 
     if (m_textTracks)
         configureTextTrackDisplay(AssumeNoVisibleChange);
 
     if (layoutObject())
         layoutObject()->setShouldDoFullPaintInvalidation();
 }
 
 void HTMLMediaElement::stop()
 {
@@ skipping 508 matching lines @@
     // or if its media controller position is either before the media resource's earliest possible
     // position relative to the MediaController's timeline or after the end of the media resource
     // relative to the MediaController's timeline.
     double mediaControllerPosition = m_mediaController->currentTime();
     if (mediaControllerPosition < 0 || mediaControllerPosition > duration())
         return true;
 
     return false;
 }
 
+void HTMLMediaElement::setAllowHiddenAudioElements(bool allow)
+{
+    if (mediaControls())

[philipj_slow, 2015/07/14 11:16:22]

ensureMediaControls() instead of the null check would probably be good, so that
the caller doesn't need to take care to add the controls attribute before using
this API.

[liberato (no reviews please), 2015/07/14 22:10:37]

done.  i chose the null check because it's unclear what this function should do
if there are no controls.  i considered an assert, since it's a test hook.

-fl

+        mediaControls()->setAllowHiddenAudioElements(allow);
+}
+
 WebMediaPlayer::CORSMode HTMLMediaElement::corsMode() const
 {
     const AtomicString& crossOriginMode = fastGetAttribute(crossoriginAttr);
     if (crossOriginMode.isNull())
         return WebMediaPlayer::CORSModeUnspecified;
     if (equalIgnoringCase(crossOriginMode, "use-credentials"))
         return WebMediaPlayer::CORSModeUseCredentials;
     return WebMediaPlayer::CORSModeAnonymous;
 }
 
@@ skipping 90 matching lines @@
 
 #if ENABLE(WEB_AUDIO)
 void HTMLMediaElement::clearWeakMembers(Visitor* visitor)
 {
     if (!Heap::isHeapObjectAlive(m_audioSourceNode) && audioSourceProvider())
         audioSourceProvider()->setClient(nullptr);
 }
 #endif
 
 }